| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [vb pp] a [adj] | 991 |
|
| 2 | could [verb] [vb pp] [art] [adj] | 242 |
|
| 3 | could [verb] [vb pp] [art] [adj] | 242 |
|
| 4 | could [verb] [verb] a [adj] | 159 |
|
| 5 | could [verb] [vb pp] a [adj] | 138 |
|
